Question

In a class, each student donated to fund as twice the number of students in the class. No of students is if the total amount is ₹1,250.

• A. 15
• B. 25
• C. 30
• D. 35

Answer 1

The correct option is B 25

Let the number of students in the class be x.

Amount donated by each student in the class is given as twice the number of students in the class i.e. 2x.

Total amount is equal to the amount donated by each student multiplied by the number of students in the class i.e. $x\times 2x=2x^2$

Total amount is given as ₹1,250.

$2x^2=1250\Rightarrow x^2=625\Rightarrow x^2={25}^2\Rightarrow x=\sqrt{{25}^2}\Rightarrow x=25$